From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755653Ab3GYNCc (ORCPT ); Thu, 25 Jul 2013 09:02:32 -0400 Received: from mail-pb0-f48.google.com ([209.85.160.48]:57328 "EHLO mail-pb0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755430Ab3GYNCa (ORCPT ); Thu, 25 Jul 2013 09:02:30 -0400 From: "Du, Changbin" To: jbaron@redhat.com Cc: linux-kernel@vger.kernel.org, changbin.du@gmail.com Subject: [PATCH] dynamic_debug: add wildcard support to filter files/functions/modules Date: Thu, 25 Jul 2013 21:02:01 +0800 Message-Id: <1374757321-5988-1-git-send-email-changbin.du@gmail.com> X-Mailer: git-send-email 1.8.1.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Du, Changbin" This patch add wildcard '*'(matches zero or more characters) and '?' (matches one character) support when qurying debug flags. Now we can open debug messages using keywords. eg: 1. open debug logs in all usb drivers echo "file drivers/usb/* +p" > /dynamic_debug/control 2. open debug logs for usb xhci code echo "file *xhci* +p" > /dynamic_debug/control Signed-off-by: Du, Changbin --- lib/dynamic_debug.c | 27 ++++++++++++++++++++++----- 1 file changed, 22 insertions(+), 5 deletions(-) diff --git a/lib/dynamic_debug.c b/lib/dynamic_debug.c index 99fec3a..cdcce58 100644 --- a/lib/dynamic_debug.c +++ b/lib/dynamic_debug.c @@ -127,6 +127,21 @@ static void vpr_info_dq(const struct ddebug_query *query, const char *msg) query->first_lineno, query->last_lineno); } +static int match_pattern(char *pat, char *str) +{ + switch (*pat) { + case '\0': + return !*str; + case '*': + return match_pattern(pat+1, str) || + (*str && match_pattern(pat, str+1)); + case '?': + return *str && match_pattern(pat+1, str+1); + default: + return *pat == *str && match_pattern(pat+1, str+1); + } +} + /* * Search the tables for _ddebug's which match the given `query' and * apply the `flags' and `mask' to them. Returns number of matching @@ -147,7 +162,7 @@ static int ddebug_change(const struct ddebug_query *query, list_for_each_entry(dt, &ddebug_tables, link) { /* match against the module name */ - if (query->module && strcmp(query->module, dt->mod_name)) + if (query->module && !match_pattern(query->module, dt->mod_name)) continue; for (i = 0; i < dt->num_ddebugs; i++) { @@ -155,14 +170,16 @@ static int ddebug_change(const struct ddebug_query *query, /* match against the source filename */ if (query->filename && - strcmp(query->filename, dp->filename) && - strcmp(query->filename, kbasename(dp->filename)) && - strcmp(query->filename, trim_prefix(dp->filename))) + !match_pattern(query->filename, dp->filename) && + !match_pattern(query->filename, + kbasename(dp->filename)) && + !match_pattern(query->filename, + trim_prefix(dp->filename))) continue; /* match against the function */ if (query->function && - strcmp(query->function, dp->function)) + !match_pattern(query->function, dp->function)) continue; /* match against the format */ -- 1.8.1.2